Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 226
of the breaker when he goes to the panel to reset it and, incase of continued tripping, eventually ties the breaker in; thus eliminating the overloadprotection which the circuit breaker is designed to give. The four step field weakeningswitch which is used on two speed equipments is a weight closed… … ELECTRIC ELEVATORS 2,881 Full Magnet Direct Current Controllers.—A typical directcurrent control apparatus of the full magnet type consists ofseveral slate panels, mounted on an angle iron frame with allthe connections made on the back of the board. The solenoid switches mounted on the slate panels…
Electrical engineering
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